.tips_box{max-width:400px;position:fixed;top:0;box-sizing:content-box;opacity:0;z-index:100;line-height:20px;padding-top:10px;}
.tips_box .tips_icon{position:relative;top:5px;margin-right:5px;height:20px;width:20px;display:inline-block;background:no-repeat center center;background-size:90%;transition:0.3s;}
.alert-loading{color: #9a9a9a;background-color:rgba(0,0,0,0.8);border-color: #000;}

.tips_box .tips_icon.icon_loading{background-image:url(img/icon_loading.gif);}
.tips_box .tips_icon.icon_success{background-image:url(img/icon_success.png);}
.tips_box .tips_icon.icon_danger{background-image:url(img/icon_danger.png);}
.tips_box .tips_icon.icon_info{background-image:url(img/icon_info.png);}